package net.minecraft.item;

import java.util.List;
import java.util.Random;
import net.minecraft.enchantment.Enchantment;
import net.minecraft.enchantment.EnchantmentData;
import net.minecraft.enchantment.EnchantmentHelper;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Items;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.util.WeightedRandomChestContent;

public class ItemEnchantedBook extends Item {
	public boolean hasEffect(ItemStack stack) {
		return true;
	}

	/**
	 * Checks isDamagable and if it cannot be stacked
	 */
	public boolean isItemTool(ItemStack stack) {
		return false;
	}

	/**
	 * Return an item rarity from EnumRarity
	 */
	public EnumRarity getRarity(ItemStack stack) {
		return this.getEnchantments(stack).tagCount() > 0 ? EnumRarity.UNCOMMON : super.getRarity(stack);
	}

	public NBTTagList getEnchantments(ItemStack stack) {
		NBTTagCompound nbttagcompound = stack.getTagCompound();
		return nbttagcompound != null && nbttagcompound.hasKey("StoredEnchantments", 9)
				? (NBTTagList) nbttagcompound.getTag("StoredEnchantments")
				: new NBTTagList();
	}

	/**
	 * allows items to add custom lines of information to the mouseover description
	 */
	public void addInformation(ItemStack stack, EntityPlayer playerIn, List<String> tooltip, boolean advanced) {
		super.addInformation(stack, playerIn, tooltip, advanced);
		NBTTagList nbttaglist = this.getEnchantments(stack);

		if (nbttaglist != null) {
			for (int i = 0; i < nbttaglist.tagCount(); ++i) {
				int j = nbttaglist.getCompoundTagAt(i).getShort("id");
				int k = nbttaglist.getCompoundTagAt(i).getShort("lvl");

				if (Enchantment.getEnchantmentById(j) != null) {
					tooltip.add(Enchantment.getEnchantmentById(j).getTranslatedName(k));
				}
			}
		}
	}

	/**
	 * Adds an stored enchantment to an enchanted book ItemStack
	 */
	public void addEnchantment(ItemStack stack, EnchantmentData enchantment) {
		NBTTagList nbttaglist = this.getEnchantments(stack);
		boolean flag = true;

		for (int i = 0; i < nbttaglist.tagCount(); ++i) {
			NBTTagCompound nbttagcompound = nbttaglist.getCompoundTagAt(i);

			if (nbttagcompound.getShort("id") == enchantment.enchantmentobj.effectId) {
				if (nbttagcompound.getShort("lvl") < enchantment.enchantmentLevel) {
					nbttagcompound.setShort("lvl", (short) enchantment.enchantmentLevel);
				}

				flag = false;
				break;
			}
		}

		if (flag) {
			NBTTagCompound nbttagcompound1 = new NBTTagCompound();
			nbttagcompound1.setShort("id", (short) enchantment.enchantmentobj.effectId);
			nbttagcompound1.setShort("lvl", (short) enchantment.enchantmentLevel);
			nbttaglist.appendTag(nbttagcompound1);
		}

		if (!stack.hasTagCompound()) {
			stack.setTagCompound(new NBTTagCompound());
		}

		stack.getTagCompound().setTag("StoredEnchantments", nbttaglist);
	}

	/**
	 * Returns the ItemStack of an enchanted version of this item.
	 */
	public ItemStack getEnchantedItemStack(EnchantmentData data) {
		ItemStack itemstack = new ItemStack(this);
		this.addEnchantment(itemstack, data);
		return itemstack;
	}

	public void getAll(Enchantment enchantment, List<ItemStack> list) {
		for (int i = enchantment.getMinLevel(); i <= enchantment.getMaxLevel(); ++i) {
			list.add(this.getEnchantedItemStack(new EnchantmentData(enchantment, i)));
		}
	}

	public WeightedRandomChestContent getRandom(Random rand) {
		return this.getRandom(rand, 1, 1, 1);
	}

	public WeightedRandomChestContent getRandom(Random rand, int minChance, int maxChance, int weight) {
		ItemStack itemstack = new ItemStack(Items.book, 1, 0);
		EnchantmentHelper.addRandomEnchantment(rand, itemstack, 30);
		return new WeightedRandomChestContent(itemstack, minChance, maxChance, weight);
	}
}
